Chassis Hardware for Marshall 8100?

[Robert Technology]

Hello!

Does anyone happen to know what the chassis hardware is for a Marshall Valvestate 8100 head?

I'm finishing a repair on one of these amps that someone else started years ago, and the hardware seems to have disappeared before making it to my bench. There are six screws/bolts that tie the chassis to the head cabinet but they are smaller than the typical M4 chassis screws from other Marshall heads.

Seems like a silly question to put out to the forum when I could just grab a handful of hardware at the store, but I thought someone here may know exactly what I need.

Thanks!!

[Bloomfield]

I don't have any experience of that model, but there is an M3.5 thread size, so that could be it. Even M4 seems small for the job though. I would assume it would be metric; in any case 8-32 is very nearly the same diameter as M4 but coarser and 6-32 is a bit smaller. There is an old British thread, 4BA, that is in that range but has been fairly obsolete for a while so not too likely.

Good luck,

Andy

[g1]

Do these go into clips? Seem to recall some of the valvestates not using machine screws, but more like self-tapping/wood screw type thread.

[drewl]

8100's are the old ones, not cage nuts but the little clip things that grab the threads, right?

Pop one out and head to Home Depot.

[nevetslab]

8100's are the old ones, not cage nuts but the little clip things that grab the threads, right?

Pop one out and head to Home Depot.

You seem to have a lot more faith in Home Depot having industrial hardware than I do. I've never found what would be specialty hardware there. And, for certain not M3.5 hardware. I'd go to McMaster-Carr or similar resources, but that's just experience with Home Depot (walking distance from my home).

[J M Fahey]

Donīt remember it being M-anything fine thread metal screws type at all, but "drywall type" screws, either "wood" (coarse) or "fine" thread.



Not meant to screw on nuts of any kind, not even pressed-in ones, but folded spring steel type floating clamps.

Large heavy Marshall heads use metal thread bolts into real square nuts (cage nuts?)

but SS means lighter stuff.

As common as mud.

[Jazz P Bass]

Marshall used a U-type nut.

Not too sure of the thread.
I did screws that fit the nut at Lowes.
They where a tad short but they worked.
Slide the clip off & take it to the store and see what fits.

[drewl]

Another advantage of working in electronics.

We decommission all kids of equipment so I have tons of oddball hardware like these clips, cage nuts, the press in kind etc.

[Robert Technology]

Thanks for all of the input everyone!

They are definitely the clip style "nuts" that several of you mentioned, and I also seem to recall these amps having something closer to a drywall screw than a machined bolt style.

I'll take the clip to the hardware store and see what I can find. Luckily, my town still has a place that's better than Lowe's/Home Depot.